Transmission system for statistical data



April 1,- 1941. J. w. BRYCE TRANSMISSION SYSTEM FOR STAQISTICAL DATA Filed Oct. is, 1938 6 Sheets-Sheet 1 INVENTOR BY M ATTORNEY April 1941. J. w. BRYCE TRANSIISSION SYSTEM FOR STATISTICAL DATA Filed Oct. 19, 1938 e sheets sheet 2 ll- INVIEwW ATTORNEY A ril 1, 1941. J. w. BRYCE TRANSIISSION SYSTEM FOR STATISTICAL DATA 6 Sheeis-Sheet 3 I l v r1 FJ An Y a Filed Oct. 19, 1958 14 A'TTORNEY pr 1941- J. w BRYCE 2.23 .130

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Filed 001:. 19, 1938 6 Sheets-Sheet 4 BY M44...

ATTORNEY J.- w. BRYCE TRANSIISSIO SYSTEM FOR STATISTICAL DATA April 1, 1941.

F ile d Oct. 19, 1938 6 Sheets-Sheet '5 ATroRN y and punching means for recording Patent ed Apnl, 1941 V UNITED. STATE "PATENT;

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James W. Bryce, Glen Ridge, N. 1., assignorto International Business Machines Corporation, New York, N. Y., a corporation of New York Application 0mm 19, 1938, Serial No. 235,8l9 (or 178-4).

t 10 Claims.

This invention relates to transmission systems for statistical data and, more particularly, to those systems of the so-called check back" type wherein data received and recorded at a distant station is analyzed and retransmitted to the initial station for purposes of verification. One

form ofsuch a check-back system is disclosed herein, another form being shown in my copending application Serial No. 235,820 and still another form being shown in my copending application SerialNo. 235,821.

It is the general object of the instant invention to provide a unique system for transmitting staimpulses are 'sent to station .B" to'cause' thetistical data including novel means for effecting the verification of the data transmitted.

More particularly, itis the object of the in- .vention to print and transmit statisticaldata to effect printing and punching of said data at some distant point, novel means being .then provided for the punched data to be retransmitted to th original point for visual verification.

It is within the contemplation of the invention to provide a system for transmitting data in which transmission is effected at one speed andre-transmission is effected .at the same or any other desired speed for the purpose of verifying said-data, andin which an indication is made to appear at the receiving station when the retransmitted data has been correctly verified.

It is also contemplated to provide automatic timing means to indicate when the control ele- "A," this data. is received and printed to provide a -'visual check against the previously printed data at station A. If there is'an agreement-a new ments of each station of'the system are in'need' of adjustment, and accordingly to provide means 'to send out a special repeat signal from each station to bring the other station automatically into adjustment.

. Another object of the invention is to provide a novel storing mechanism set up from data punched in a record card and utilizedinretransmitting said data for verification purposes.

Another obiect is the provision of means whereby transmitting from the card data storing mechanism in any column is prevented until all I mechanisms for eflecting' such transmission are definitely positioned with relation to that column.

Still andher object is to provide a novel system m1- transmitting data in which multipleimpulses representing data sent out from. the transmitting station and cause energization of a chain oi value manifesting relays at'jthe re. celving station according to the number ofimpulses received during a predetermined time in- Acoording to the present invention, a. contact control key at a station "A? is operated to send out a series of impulses which cause a'record card to be fed into a punching position at'a station B," located at a distant point from stationfA."

Then, upon depression of a characterkey, printing of the corresponding characters is effected at station A," and-atthe same time-a series of energization of. a chain ofrelaysthere to apredetermined extent dependent upon the character transmitted. These relays control the operation Y of meansfor printing and punching the charac-' ter at station -B." Immediately'following the punching operation, the character perforation is I analyzed and sent .to a relay storing mechanism. Other characters are transmitted in a similar manner, and-the perforations in the record card are analyzed and stored until the card is completely punched, at which time the storing mech-.

anism eflects transmission of the punched data from station 3" back to station A.. At station record card feedand carriage return isjinitiated. If there is no engagement, an 'adlusting key at station A is depressed to adjust station B" and also visually to indicate at that station the failure of the re-trans'mitted data .to vertify. At station B the newly punched record card is station .IB adiusts A."

- which deals primarly with numerical values, is

wellrealized by thosefamiliar with the art. In the drawings: Figs. 1 and la are representativecircuit diagrams of the transmitter and receiver respec- I tively at station A."

terval, said relays=then controlling the printing the receiver.

said data at Fig. 2b-is a timing cant of-the Fig. 1b is a timing chart in; the circuit dia- 'gram'shown'in Fig. 1.- m v e Figs. 2 and 2a are representative circuit, diagrams of the receiverj and transmitter respeccircuit I tively at stationB.

shown in Fig. 2a. 4 Fig. 3isaplanviewofaportion mitted key board. f Fig. 4 is a sectional view Fig. 5 is a sectional view taken at H of Fig-'3 oi-the trans showing a transmitting key and the various opcrating mechanism associated therewith.

taken at 4-4 of Flg3.

- Fig. 6 is a view of the dash pot control mechanlsm which is applied to certain relay contacts 1 in the various circuits of the system.

Fig. 6a is a detail plan view of the associatedwith the dash pot.-

Fig. '7 is a detail elevation view showing the mechanism card analyzing brushes and a portion .of the punching mechanism.

A preferred embodiment of the invention will now be described with reference to the accom-.- panying drawings.

Cameras KEY Connor.

At station A a special keyboard is provided as shown in Figs. 3, 4 and 5., Seven keys are shown as representative, three of them being allotted to numerical characters and the remaining four being provided for various control operations such as space control, card feed, veritying, and adjusting. If morethan three different numerals are to be transmitted more numeral keys areadded, but the four control keys are suflicient regardless of an increase in the numeral keys. Depression of any of the keys causes the operationof a special set of contacts associated therewith so as to initiate a 'corrspondthe depression of key l1 causes an insulated conducting portion Ila to bridge the contact springs llb. A notched projection "c at the same time cams latch bar It to the right andthen allows it to return to the left again under spring action so that the left extremity of bar I! is positioned above the latch point on projection l'lc to hold away from projection He, thus relasing the .key I! and allowing it to raise to its normal position under the urging of its return spring l'ld.. It will be noted that only one key may be depressed at a time due tothe presence of locks! (Fig. 4).

jacent thereto spread apart so that the combined clearance of the locks is taken up and the key down. Then at a later time, as will be described later, solenoid ll becomes -,energ1ze,d (momentarily to move the latch bar I! to the right 7 when a key is down .it maintains the locks adno other key may be moved down between them.

This structure is elementary and similar to that used in key-operated punches to prevent the operation of more than one key at a time so that no further description is believed necessary.

TRANSMITTING Coirrw'rs'roa A transmitting commutator II (Fi 1) and'a rotatable arm 2| are also located at station "A," arm 2| being maintained continuously rotating in a clockwise manner at uniform speed byfany suitable means such as an electric motor (not mutator 24 and an arm II. This device becomes operable after a card has been fullypunched to shown). The speed at which this arm is to rotate is determined by two factors; namely, the desired speed of transmission of the impulse and the speed of functioning of thereceiver mechanism at station B." As arm 2 I traverses the varioustransmitting segments of the commutator 20, a plurality of circuits are successively closeddepending upon which.cf the keys ii to "was operated to effect the transmission of a'predetermined number of impulses from the transmitting device 43. The circuits will be described i detail later.

Runs AND, Sonmvoms The mechanism actuated at the receiver of station 3" by the incoming impulses comprises a chain system of multiple contact relays Rl to R1 (Fig. 2) which control the selective energization of a plurality of print solenoids, such as the one designated 62 for example. Solenoid 62,

upon becoming energized, pulls its armature 62a and the key lever connected thereto down so" as to operate a printing mechanism which is diagrammatically represented by a platen 51, a hammer 51a, and suitable linkage 51b connected between the hammer and the key lever. -Motion transmitted through the linkage 51b causes the hammer to be moved toward the left to strike the platen. The leftward ml 'vement of the hammer closes a contact 62b to energize a punch solenoid 12 by a circuit to be described later. Punching mechanism of any convenient type such as shown inthe U. 8. Patent No. 1,772,186 to F. 1... Lee et al., for example, may be employed. Printing and punching under solenoid control are old in the art, and therefore the representation of the printing and punching means illustrated in Fig'2 and Fig. '7 respectively are believed sufficient.

A CARD ANALYZING Macrrsmsm An analyzing mechanism is located justbeyond the-punch die so that just after a perforation is 'made in a columnof the' card and the card has escaped to the next column, the per- .foration may be analyzed. The analyzing means comprises contact balls 22 (Fig. 7) mounted in an insulating support and spring-pressed towards the card C. Above the card there is a contact block 23. It is understood that, when a perforation passes over one'of the balls 22, that ball is urged upwardly by its spring to establish contact Y with the contact block 23. Referring to Fig. 20. it is seen that cooperating with the analyzing mechanism isa storing device comprised of a plurality of relays, such as relays" to 80, for each column of the card. A selecting device comprising two emitter strips BI and 82 and a pair of brushes 8i and 84 respectively is prothe manner shown in Fig. 5 of the U. S. patentto .Daly No. 2,045,437 so that as the card escapes from column. to column while being punched, the brushes are advanced from segments 85a II to segments 86a and 88, etc. g

V Oo'r g A read-out device for the storing mechanism at station "3" is provided and comprises a comread out the data from the storing mechanism and, in cooperation with a transmitter I25, to

send impulses vrepresenting that data back to A chain system of relays forms a station A." receiving means at station "A" similar to that already described :for the station "B" receiver.

Arm II is rotated in a uniform manner by means similar to that for'arm 2| but not necessarily at the same speed.-

Snscnnomzriva MEANS Although the commutators at stations A" and and tain time controlled relationship between the re-' ceiving portion of each of these "stations and the transmitting portion of the other. This comprises a control relay 65 at the receiver of each station having dash pot mechanism generally designated 64 (Fig. 6) associated therewith to control thetime of operation of a plurality of 'sets of contacts including those designated 55b, 55c, 55d, and We. Relay coil 55, upon becoming energizedattracts the armature so that a piston 6a attached to the right extremity of the armature is moved down forcing air out through an opening I in the dash pot 54. It is seen that the speed of closing of contacts 55b, 55c,55d, and 552 are dependent upon the size of the opening 1 which is adjustable in a manner to be explained presently. When the relaycoil'55 is deenergized, the outside air rushes in through the opening 6' and the armature isallowed to restore quickly under spring action and return the above contacts to their normal position.

The size of the opening 1 is manually adjustable by turning knob 6 which is fixed to a threaded shaft 6. Automaticmeans for rotating the shaft 6 in either: direction is also pro vided so as to speed up orslow down the clos-.

ing of the contacts under control of the dash pot mechanism. A train of gears, generally ties-I ignated 4, connects the shaft 6 for operation by a diiferential device 66 actuated'by a pair of pawls 9|, 92 and ratchets 66a, 66b. The shaft 6 formsa frictional mounting for one of the gears of the -above train. The ratchets may be locked or released according to the position of a pair of cooperating detents 2 and 3. The detents are normally in the position shown in the drawings and are mounted on a common shaft I. Asolenoid X controls the engagement and disengagement of the detents. When detent 2 is disengaged from ratchet 66a, detent 3 is engaged in ratchet 66b. A magnet I35, when energized, causes the pawl 9| to feed ratchet 66b in and that the punch at station B has a pack of fresh record cards in its hopper, and that the two stations are in adjustment which i described later. It is first necessary to feed a card from the hopper between the'die and stripper of the punch to a punching position. This is accomplished bytransmission of a predetermined number of impulses from station A to station B." These impulses cause the energization of a selected control'magnet of the chainv relay system already described which in turn causes the punch clutch magnet to be energized in a man-I ner to bedescribed presently. A key |l'(Fig. 1),. referredto as the card feed key, is depressed (see Fig. 5 and Fig. 1) to initiate the above operation.

Card feeding The depression conducting portion |5a to bridge contact springs |5b and complete a circuit to connect relay coil 'directly across' the line. Relay 29 also becomes energized by a. circuit from right hand side of the line 21, wire 28, contacts "a now closed, relay coil 29, to left hand side of the line 26. Relay 29, when energized, closes its contacts 29a which in tum complete a circuit to energize clutch magnet as follows: right hand might be well to mention here that the depresclockwise one tooth. A magnet I36 cooperates with pawl 82 to feed ratchet 68d counterclockwise one tooth. The manner in which these mag nets 'are energized will be better understoodlater from the description of the circuits of the system: It is sufficient for the present to state that the stepping of ratchet 66b in a clockwise direc-- tion causes the threaded shaft 6 to backup by, motion transmitted thereto through the gear 'train 4 and allow anincrease in the size of opening I. On the other hand, the counterclockwise movement of ratchet 66a causes motion to be transmitted through the gear train 4 to turn shaft 6 clockwise thereby decreasing the size of the opening I. ratchet 66b isoperated in the direction indicated by the arrow to speed sion of any the keys II to H causes the clutching in oi the CC-3 cam to the commutator shaft and the energization of relay coil 26.

The energization of relay 3! upon depression of the card feed key l5 causes the'closing .ofcontacts 35a. and c-y. A circuit is completed through contacts 35a at the time arm 2| contacts segment Zlla' of the commutator 20 in the following manner: from line 21, wire 28 to contacts 35a-now closed, relay coil 30, contacts 36b. commutator segment 20a, arm 2|, to line 26.. Relay coil 30, upon becoming energized by the above circuit, closes its contacts 30a to cause thc'energization of relay coil 38 from line 21, contacts a,

up dash pot action and ratchet 66a i operated to'slow down thisaction. Thesolenoid X is located in series with magnet I36 and is energized when the latter is energized so asto release the ratchet 66a. detent 3 so that solenoid X- need not be operated upon the. operation of magnet I36. The

purpose of the dash pot control mechanism and Ratchet 66b is. normally free of:

the. automatic. adjustment therefor will be explained in connection withfthe explanation of the circuits and operation of the system which.

now follows.

' GENERAL 0mm:

At the start'lt is assumed that the printing means comprisingtwo typewriters at station "A" and one at station B have paperinserted there' relay coil 38, to line 28. The holding circuit for relay 38 is through contacts 38a now closed and cam contacts CC-l. As previously mentioned,

theCC cams are driven at the same speed as arm 2|,,and when the arm 2| is at line D of commutator 26, the CC cams are in the well-known D" position as illustrated in the timing diagram (Fig. 1b). Relay 38 is provided with 'ontacts 361) which are located in series wflzh the transmitter 43 and are normally open. Thus, it is seen that transmission may be effected only when the energization of relay-coils 30 and 8.,

has occurred previous to the passage of arm 2| .over thevarious, transmitting segments of the commutator 2|). v

7 Traminitting circuit v d With relay-3 8 energized, a series of impulses may now be transmitted. The transmitting circuit is from line 21 through resistance 4|, contacts b -now closed, wire :2, contacts say now closed, relay coil 4!, segment spot 20b, arm 2|. to line 26. The how of current through resists of the card feed key ll causes is impressed upon the input of the transmitter tiorr A to station B. Relay 45, upon being energized by the previously traced circuit, closes its contacts 45a to energize relay coil 44 from ance 4 I causes a potential drop across it which 43 to cause an impulse to'be sent out from st'aline 21, through relay contacts 4511, through relay coil 44, to line 25. Relay coil 44 is then held energized through its contacts 440. and cam con- 350 through 35g cause transmission of impulses,

five in number. Assuming the key I5 has been released by the operator, it is still held in a down position by latch I9 in a manner already described for key II.

Interlocking circuits Following the transmittin portion of the cycle, a circuit is completed to energize relay coil 39 by means of the arm 2| from line 26, through arm 2|, through segment spot 21in, through contained energized through contacts R2d, the holding circuit being from line 41, relay coil RC, contacts RIa, relay contacts R2d, contacts 53a, to line 45. The contacts RIa are also of the make before break type. Relay contacts 5Ic.also close to cause the energization of relay coils 55 and 55' by completing a circuit from line 47, relay coils 55 and 55' in .parallel, contacts He now closed, to line 46; The holding circuit for these rails is through contacts 55'a, 60, SI, 5317, and

A plurality of contacts are operated under the control of relay coils 55 and 55'. Those operated by coil 55', including contacts 55b, 55c, 55d, and 55e, are provided with dash pot control mechanism as already described. Contacts 55'a'a'nd 55'), which are operated by relay coil 55', are

not dashpot controlled. The purpose of the dash pot is to prevent any one of the chain relays from being energized to effect control until the completion of the time during which all possible. signal impulses have entered the chain relay group. Accordingly, the. adjustment of the dash pot is such that contacts 55b do not .close until the arm 2| at station A" has contacted 'th'segment spot 20m. The adjusting circuits tacts 44b now closed, relay coil39, to the other side of the line 21. Relay coil 351s held energized through its contacts 39a and relayconjtacts 29b now closed. The energization of relay coil 39 by the above circuit opens its contacts 5% and prevents energization of the relay coil W should the key I5 remain depressed for another machine'cycle. This effectively prevents transmission of a repeated series of impulses for the same depression of the key. Key I5 is released near the end of the cycle when cam contacts 00-3 close to energize relay I8, which shifts latch I8 (Fig. 5) to permit key I5 to move upward under spring action in the same manner as illustrated for key II. If the operator. however, has not yet released key I5, the shifting v of latch is has no effect and magnet 40 remains energized due to continued closure of relay contacts 29a. Once the operator removes pressure from the key, however, the next shifting of latch I9 will release key I5 thereby deenergizing relay coil -29 and consequently relay coil 3!. Relay contacts 3% then are allowed to close once more and, upon the next key depression, a new series of impulses may be transmitted.

Receiving mechanism the energization of relay coil.52 for each impulse.

Cell 52 closes its contacts 52:: upon each energizatlon. Thefirst impulse completes a circuit from line 45, relay contacts 52a now closed. through center and upper relay contacts 5Ia, Rlb,

R2b, etc., through RIb, wire 49. relay coil 5|,

and back to the other side of the line 41. Relay coil 5I then shifts its "make before break conimpulse entering the chain causes an energiza- I will be explained later. I

The next impulse which enters the chain relay group causes the energization of relay coil R2 by the following circuit: trend ,line so, relay contacts 52a, relay contacts 5Ia. in the position shown, relay contacts Rlb in "a transferred position, relay contactsRZa, relay coil R2 in the position shown, to line 41. Relay coil R2,- upon being energized, shifts its a, b. c and (1 contacts. The shifting of the R211 contacts, which are of "make before break type previously described. transfers the holding circuit for relay RI back through contacts 52a. Therefore, upon opening of these contacts, relay tRI is deenergized. Relay R2 is held energized through contacts RM and R311. In a similar manner each successive tion of a new relay and deenergization of the previous one. When the five impulses representative of a card feed are all received, relay R5 is energized to manifest. this fact. Shortly thereafter relay contacts 55b close and a circuit is completed as follows: from line 48, relay contacts 55b, switch 56 now closed, contacts Rl'c, R20, R30, and R40 in the position shown, contacts R now in a shifted position, solenoid 51, to line 41. I'his circuit energizessolenoid 51 -causing it to pull down its plunger 51a and to close.

, its contacts 81b. The closing of contacts 01b completes a'circult to energize relay coil as follows: from line 45. relay coil 65, contacts 51b, to line 41. The depression of plunger 51a also closes contacts 51c causing relay coil 55 to become energized by a circuit-from line 41, con- 53. upon energization, opens its contacts 530 to tacts" '5Ia, that is, the center and lower contacts make before the center and upper break. Coil 5| thus remains energized for the duration of the first impulse through relay coil 52. Contacts 5") close and cause theenergization of rela coil RI from the left-hand side of line 45,

' through contacts 53a, contacts 5Ib, contacts RI relay coil RI, to line 41. Relay coil RI is ma 7 deenergize relay R5, and also opens its contacts 53b to deenergizc relay coil 55'. With the energization of relay coil 68. contacts 58a close to complete a circuit from line 45. through contacts 55a, through the punch clutch magnet III and back to the right-hand side of line 41'. Energiza+ tion of punch clutch'magnet III shifts contacts 59 to energize the punch motor 55 by completing a circuit thereto from the left-hand side of line 45, through contacts 59, through motor 55, and

back to line 41. The punch motor then operates to eifect thefeeding of a new record card to the punching position.

- side of line 888.

Digitimpulse transmission Station B is now ready to receive the impulses representative oi statistical data from station "A." One of the digit keys at station A,

for example, key I 2 (Fig. l is now depressed and closes its associated contacts I2b in a previously described manner to eflect the energizetion of the relay coil 82. The closure oicontacts 8% then completes a circuit from' line 28,

through contacts 82b now closed. through type-- writer solenoid S2 and back to the right-hand Energization oi solenoids:- causes printing of the numeral 2" atstation A." Closure of contacts 82a causes a pickup oi relay 38. and also relay 88as previously described so as to prepare the transmitting circuit. Closure of contacts 820 and Mdthen permits transmission of two impulses from station A" to station B," the transmission of these impulses be- 1 ing eiiected inthe'same wages for the card ieed Digit impulse reception At station B, upon reception oi'the two impulses, relay coil R2 becomes energized and, at

thetime dash pot contacts 88b close, a circuit is completed from the left-hand side of the line 88, through contacts 8%, receiving switch-.88 now closed, through contacts Rio in position shown,

through contacts R in a transferred position,

Plunger 82a is through solenoid 82, to line 81. pulledjdown to efiect printing, on the sheet .and platen 81, 01' the numeral 2. Contacts 82c now close to energize relay coil 83 in a previously described manner. Contacts 822:, in closing. en-

ergize relay coil]! by completinga circuit as follows: from line 88, escapement contacts 88,

interposer solenoid 12, contacts 82b, to line 67. Inter-poser solenoid 72, upon being energized,

closes interposer contacts I8 to energize thepunch et I8 by a circuit from the line 88,-

iotoii contacts as in the position shown: punch magnet I8, interposer contacts I8. to line 8?. In the well-known manner the energization of punch magnet I8 causes the punching oi the digit 2 in the record card.

Punching operation v The punching impulse is efiected in the first column or the card in the punching position. A

skipbarmayormaynotbeusedasdesired, It noskipbarisusedthecardisspacedcolumnby sizes coil I8 causing contacts 180, to close and complete a circuit to energize a 'coil 88 as follows: from line 41, emitter strip 82, brushes 88,

segment spot 88, contacts 18a now closed, relay coil 88, to line 88. Relay coil 88 is then maintained energized throughits 88a contacts, now closed, and the normally closed contacts 88a. Closure oi contobts 88b places relay coil 8'] in parallel with relay coil 88 thereby to efiect its energization.

' Storing of the data The next depression of a key at station A 8 causes the transmission'of a new series of impulses to station B and effects the printing of its corresponding character and the punching of the same in the record card in the manner Just described. The card is allowed to'escape a column after a punching operation and this shifts brushes 88 on the emitter strip to spot 88 and the brushes 22 then analyze-the column that has just been punched in the record. Energization done or more of the coils 'I'I, I8, and 18 brings about the closure of corresponding contacts 'I'Ib,

. 18b, and-"I86 respectively to energize character relays 88, 87, and 88 respectively. Since the brushes 88 have escaped to the segment spot 88, the new closure of contacts Ila, 18a, etc. will have no effect upon the 81, 88 and 88 coils. Each new series of signal impulses, transmitted from station "A" to station B will thus cause the energlzation of an additional series of relays in the storing mechanism; For the purpose of clarrelay R8 in the usual manner at station 13".

column to a first punching position in a manner which is explained later. Energization oi..the

. punch magnet I8 causes the depression of the usual punch motor bar on a punch which punches the record card and permits it to move forward one column ready to receive a new perforation. The forward movement 02 the record card places the just punched column of the card in a position under contact block 28 (Fig. 2c). At'the' time the record card was fed into the punch. the

the card rack left contacts 88 (see Fig. 2) are closed causing the energization or relay coil 88 by a circuit from the right hand side of line 81,

relay coil 88, punch rack leit contacts 88, to line 88. Relay coil 88 is maintained energized through tacts 88b areal'so closed to complete an'analyzin: circuit as follows: from line 81 (Fig. 2a), contacts 88b now closed, contact block 28, hole in the card which case represents a 2,"

82 ,at the'2" position in thelcard,'relay coil I8, -to line 88. The circuit just traced enerits contacts 88a and last column contacts .18, both now closed. With relay coil 88*energized, con-' when relay contacts 88!) (Fig. 2) close, the sole- I hold 88 is energized by a circuit through contacts RAc inthe transferred position to eflect a spacing or the typewriter at station 8".-

space control relay I88 from line-88, relay I88, contacts 882:, to'line 8]. Relay B88, upon becoming energized closes its contacts i88a (Fig. 2a) to complete a circuit from the right hand side of the line 8?, contacts I88w, relay 88, to line 88.

Closure oi contacts 88b energizes relay coil 88 in the following manner: line 87, emitter strip 8|,

brushes 88, segment spot 88a, relay contacts 88b, I

relay coil 88, to line 88. Brushes 88 which con tact the emitter strip 8! are placed one column ahead of brushes 88. The purpose of this is to cause the energization of the relays in an advanced position or the relay storing unit while the space control relay I88 is energized. Relay 88, the energizing circuit for which was just described, is located in the advanced position. of the storing mechanism. when relay 88 becomes enc it is held in an operated condition through its contacts 88:: which close. Contacts 88b also close'and provide a circuit to energize relay coil 88 as follows: from line 81, contacts 88b, relay coil 88, to line- 88. Relay coil 88 is held through its contacts 8811 which close, and contacts 88b close to complete a circuit to relay coil 81. Similarly, a circuit is completed to energize relay coil 88 so that each of the relays 88 to 88 now re main energized.

Contacts 88b close to complete a circuit for energizing a Relay I functions to cause the record card in the punch to be spacedione column by a cir-' cult from line 46 (Fig. 2) center and upper contacts 69, punch magnet '15, contacts Iiilb now closed, to line 41. The energization of the punch magnet causes a spacing of one column to oc-- cur even though no punching is efiected. The

blank column on the card which was Just spaced is now positioned at the analyzing station. The

column being blank, no circuits are completed through the analyzing brushes 22 to the character relays oi the storing mechanism. The brushes 84 are now resting on a segment spot 88 corre-'- sponding to spot 86a which was previously occuv pied by brushes 83, and no circuits may be completed from-spot 86 to any of the character relays because none of the contacts-of the'relays TI to 19 are operated at this time, due to the fact that the analyzed column was blank. Also, before this time relay Ill has become deenergized by the energization of relay coil 53 (Fig. 2)

line 4i, wire in, may c'oil no, com. me.

relay contacts Iilb in' the position shown,

through segment spot 241' and rotatingarm 28,

relay contacts Illb. to line. Relay "dis-held energized through its contacts "la and cam .contactsCC-l. The CO cams at station 8" oper- .ate in synchronism with arm 25., The purpose of the I c contactsiis toprevent energiaation' of relay I" until the commutator III is resting in its next transmitting position. with relay Ill energized, its contacts 8b close to complete a readoutcircuit. Assuming that relay "is enerto representa "1" stored .in the initial 001-. umn, the readout circuit may be traced from line following-the closing of contacts 940. Contacts 1 53a. are opened to break the holding. circuit to relay coil R4 and, when contacts Ric shift back I to theirnormal position, the circuit to coil Hill is broken. The factthat relay coil I00 is deenergized prevents any circuit to the cells", 80,

. 9!, etc. (Fig. 2a) because contacts Ilia are open.

It has been shown in the foregoing description how impulses representative of numerical data andspaces between such data are transmitted.

' Likewise, the reception oi these representative impulses at a distant station 3" to eiiect punching and printing has been explained in detail. 'It has also been shown how an analyzing mechanism cooperating with the punched record card column efiects the set up of a relay storing mech. anism to hold the data represented by the perforations for use at a later time, -The method or reading out this data from the storing unit and transmitting the same back to station A" -i'or"verification purposes is the next stepin the sequence of events and will now be explained.

Card eject When the card has been completely punched and/or spaced out to the last column position, a pair of last column contacts 16 open todeenergize relay 59. Just after the opening ot contacts 18 another pair or last column contacts IIII close. The opening of contacts I6 and deenergization of relay is cause opening or contacts 59b and prevent furthercircuits through contact block 23 (Fig. 2a). .tacts II! (Fig. 2,) energizes stacker magnet II! The closure or conby a circuit iromline 4!, contacts III, stacker magnet lot, to line 41. Energization oi stacker magnet I05 causes ejection oi the just punched R in the customary manner. Whencontact 55b closes at station "3 (Fig.'-2)-,-a circuitis completed to energize solenoid I" through the shirted contacts Ric and cause the closure of its contact: "2b and Illc. When contacts lllb close,

. relay Ill becomes energized and is held through 41, relay coil II, relay contacts Illb, fcontacts Illd, resistance Ill-relay contacts lilo in the position shown. commutator Ill and brush I", through the first active segment spot Illa, wire I, contacts I'Ic now closed, segment 24, arm 25, contacts- IlSb-nowclosed, to the other side oi the line u. Energiza-tion or III by-the'abovecircuit closes'i-ts points II'la to pick up coilIIS which is then-maintained energized through cam contacts COI.-

Contacts lltb prevent shifting thecommutator Ilt unless readout from the storing unit has just occurred. These contacts now close to pcrmit the shifting circuit which will be described presently. The number of impulses to 'betrans-.

mitted irom a certaincolumnis dependent p the number of character relays which are enersized in that column. The number or these relays which are energized is dependent upon the number or character or space impulses which were 'sto'r'ed in this column of storing. mechanism. If a space impulse was .the readout contacts 0! this column would be closed. Theflow oicurrent through resistance III impresses a potential diii'erenceon the-input of these impulses back to station "A.

Retransmission from B to "4" Following the completion or the transmission,

3 the 25 contacts segment spot It! and a circult is completed from one side of the line 41, via-wires I", I" to-contacts- I'lld now-closed. magnet III, contacts Ilic now closed, contacts I Ilb, through segment spot -24), through arm ll.

through contacts Ilib also'now closed, to line It. Energiaation of magnet III actuates its armature l2l'a which moves a hook. I ll towards the right. When the arm 25 has passed segment spot 24) the magnet I2I is deenergized. Its armature Ill therefore returns to its normal position under action or spring Iilb. The hook.

is'thereiore moved'to the left and rotates. the

ratchet wheel II. one tooth counterclockwise;

The wheel I Is rotates the shaft I22 and the brushes H1 and I23 aflixed to this shaft one segment pomtion in a counterclockwise direction. The brush Ill therefore rests on segment spot IIib and transmission. from the lt-il column oi relays is now effected ina manner similar that just described.

its relay contacts Illa now closed and the normally closed contacts lib. Closure or contacts .iub (Fig. 2c) completes a circuit as follows:

Following the completion (rt-transmission from all of the setup columns, the last energisation of magnet III and rotation oi shaft III brush. III in. contact withspot lllm. Acircuit is therefore completed from line 40 via wire in v to commonv segment III, brush I23, segment spot HOG, relay coil .5, wire I", magnet "I, either contacts Illd inclosed position, or Illa. to line' 41. This circuit energizes relay coil II which opens its contacts lib (Fig.2) to deenergise relay --coi1 III. The openina oithe "to contacts (Iig.

stored therein' all to transmitter I25 and provides for transmission 2a) prevents any furtherenergization of relay coil I08 at this time. Energization of magnet'l2l rotates shaft I22 counterclockwise so as to move brush I23 to segment spot 6b. The magnet I2i remains energized until cam contacts CC-fl open to drop relay I08. At that time contacts Illa are also open and there is no complete circult through magnet I2I. When armature I2Ic is restored to normal, contacts I'Ma again close and another energizing circuit formagnet I2iis then completed in the following manner: from line 46 via conductor I31 to common segment 6, brush I23, segment spot 6b, magnet i2l, contacts 'I Ha, to line 41. Magnet I2I, upon becoming energized, shifts its armature I2Ia' in a clockwise direction to move hook II8 to the right and open contacts Ilia. once more to deenergize the magnet HI and again causes a one tooth advance of shaft I22. The above sequence of events occurs from the time of the location of .brush I23 on spot lI6c until the, brush I23 is Energization of relay 95 also opens relay contacts 95a to deenergize the storing relays 8'l90, 9699 and I26-l29.

rotated to its original or home position.

Verification at A Reception of the verification impulses at sta tion A" effects the pickup of the corresponding relays RI through R4 (Fig. 111-), depending upon the signal impulses transmitted. In a manner similar to that described for station B, energization of these relaysand subsequent closure of record are effected. If the card fails to verify,

the adjust key ii is depressed and causes a pickup of a green or red signal at station E. 'llhe signal circuits will be explainedlater. Such a signal at this time indicates to the B operator that the card failed to verify and accordingly the just punched card is removed. Adjustment is then made in a manner to be described presently. A new series of operations then ensues for the same data andif this also fails to verify, 3

it is understood that the machine is in need of repair.

Dash pot control adjustment In starting up and at various times it is necessary to adjust the dash-pot controls at-both or the stations to insure proper timing ofcertain circuits associated with the receiving chain of relays. The present transmission system re quires one or more of a series of impulsesto ef= rect transmission of statistical data as already mined by the speed of rotation ofthe transmitting commutator at station A". That is, the

first of a'series of impulses triggers off the .dashpot relay 55. The contacts controlledby this relay must not function before the time has passed when the, last possible transmitting signal im-.

pulse might be received from station A.'?

' .I'herefore, since the first impulse from station A? triggers oi the dash-pot relay at B, if the time of closureof these points is checked by an additional impulse iollowingthe time of signal impulses, it is possible .to, determine if the adjustment is correct or not. on the dash-pot relay. L ,Mea'ns is provided to automatically efiect correct adjustment at station 13" ,byth signal of adjustment from station "A" and likewise station Bf to Alf For the machine to be in adjustment,'-the contacts 55b must close following the completion or. the signal impulses and while the arm 2! at station "Af is contacting segment spot 20m." s I When starting up sending operations, for example, each morning prior to beginning transmission, the operator at station A begins the adjusting operations. Operator at station A depresses the adjustingkey I? and operatorat 3" opens receiving switch fit prior to adjusting to prevent printing. Depression of key ll eiiects the transmission of seven impulses to station B and energization of relayRl 'at this stationin the customary manner. Sets of contacts c, 55d, and We are operated .concurrently with contacts 55b for testing the adjustment, and contacts 55 concurrently with 55a. The segment spot 20m, which isused for adjusting purposes is longer than any of. the other segment spots. This is to hold relay Rl energized for an appreciable period and allow .sometolerance in the adjustment of the clash-pot relay. Relay R77 is not provided with the usual holding circuit through contacts at station E. relay R1 is energized only while the arm 28 contacts segment 20m. If contacts we close while relay R? is energized, the dash-pot (Fig. 2) control is in adjustment, and a circuit is completed as follows: line it, relay contacts We nowclosed, relay contacts R'le now closed, contacts iBIc, coil 688,. to line H. Relay I88 upon energize.-

tion is heldenergized through its points ittc and relay contacts Bid and i281. Relay contacts $8M, in closing, light a green lamp in the holding circuit which informs the operatorat'station 'f that his machine is in adiustment- Also,

relay 6% is energized to open its 68c contacts and drop relay at. Operator at "B" would then begin sending an adjusting impulse to station A to operate similar circuits at the latter station in a manner to be described shortly.

If the dash-pot control at station 9B" is too rapid, the uence of events is as follows: The

contacts the become closedbefore the adjusting impulse opens contacts R79 and relay coil i3! is described. Each impulse of this series energizes a corresponding relay and causes deenergization of the one just preceding it. Because of this the last relay energized is representativeof the transmitted signal, and no relay must become efiective until the time for picking up the last relay in the group has been passed. This timing is eifected by dash-pot controlled relay contacts, the adiustment tor which will now'be described.

These contacts at station "Bfwhich are energized-by a circuit iromlinet5,-contacts the,

contacts Rig, relay coil iii, to line it. Relay coil 63E is held ener through contacts Idle and contacts Bid and I20r. Contacts .itib close to energize relay coil 68%. when R'lh, closes, coil its ing then held through contacts I82a, tilt? andi2. Relay contacts "2a, in closing, lights red lamp in the holdingcircuit to show adjustment is not correct. 1 F It the cl-pot control at station B'1 s too slow, contacts R'lj open and close before 'fcontacts d open and thus relay coil Ill-"is ener- I pot controlled must close within a period deter- Hence,

that the gized. Also, een m is energized, but cofl m is not energized at this time. A red light in the holding circuit indicates machine is still out of adjustment. The energization of coil I34 automatically efl'ects an adjustment of the dash-pot mechanism to speed up the relay action by closthe intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is: 1. A data recording system comprising a first station having therein a direct recording means to record original data, data transmitting means .for transmitting a series of signals representing said original data, receiving means for'receiving check-back signals, and an indirect recording means for recording data represented by said check-back signals for visual comparison with net I36 to slow up the dash-pot action by causing a clockwise rotation of shaft 6.

To transmit an adjusting impulse from B" to "A the adjust key I04. is depressed to energize relay coil IZIi- (Fig. 2). Relay "his then held through its contacts 120a and normally closed contacts I 38d in parallel with -6. The i200 contacts (Fig. 2a), in closing, cooperate with the shifting of contacts'lillb to provide a circuit for picking up relay, coil 18 when arm 25 contacts spot 24:. to provide for transmitting the adjusting impulses through the contacts IZOJ, g, h, k, m, and the transferred contacts I200 and d. An

The l38b contacts then close the original recorded data; in combination with a second station having duplicating means controlled by the transmitted data signals for dupliimpulse circuit maybe traced as'follows: from line 41, contacts l20d in a shifted position, re-.

sistance H2, contacts mic in a shiftedposition, contacts l38b now closed, contacts i201, i205! or I207, etc. now closed, corresponding commutator segment 24a, 24b, or Me, etc., arm 25, contacts l20e to linelG. The last impulse occurs when arm 25 is on segment 24c and effects adjustment at A in a manner similar to that 'back a single adjusting impulse to station B'i e first station.

' cating the data on a multi-column record,'each .after it is duplicated, storing .means controlled by the analyzing means to retain the duplicate data from the analyzed columns of the record until a predetermined later time when'all oi the transmitted data has been duplicated, and readout means cooperating with the storing means at said later time forsending out check-back signals representing the duplicate data to the 2. A data recording system comprising a first station having therein a direct recording ineans to record original data, data transmitting means for transmitting a series of signals representing said original data, receiving means for receiving check-back signals, and an indirect recording means for recording data represented by said check back signals for. visual comparison with the original recorded data; in combination with a second station having duplicating means con-' trolled by the transmitted data signals for dupliwhich indicates this fact to the -B" operators The relays I3l-l34 are deenergized either upon the next incoming signal, at which time relay coil ii is energized and opens. its Sid points, or when contacts i201 open upon sending an adjusting signal. Relay coil I20 (Fig. 2) is held energized through contacts I38d "and CC-G in parallel. Contacts CC6 close before coil I3! is energized to open'its contacts 138d, but contacts CC-J open before contacts "8d reclose upon deenergization of I38, and relay I20 is dropped at,

fore that coil 5!, when energized remains in its I operated condition long enough to drop coil 83. Coil II is then deenergized in a previously described nianner and its contacts Sic close to pick up coil 55 once again. i

While there has been shown and described and out the fundamental novel features 01' the invention as applied to a single'modiflcation, itwill be understood that various and subetihitions and changes in the form' and details of the devioaillustrated and in its operation may bemade bythoee skilled in the art without depertingiromthespiritottheinvention. Itis of the record until a predetermined later time when all of the transmitted data has been dupli' cated, and readout means cooperating with the energized storing relays at said later'time for sending out check-back signals representing the duplicate data to the first station.

3. A data recording system comprising a first station having therein a direct recording means to record original data, data transmitting means for transmittinga series of signals representing said original data, receiving means for receiving check-back signals, and an indirect recording means for recording data represented by said check-back .signals for visual comparison with the. original recorded data; in combination with a second station having a plurality of serially arranged relays adapted to be energized in succession by the transmitted data signals in accordance with the magnitude of the data represented by said signals, record perforating means controlled by the last energized relay in theseries tomake duplicate data perforations-in predetermined columns of a muiticolumnrecord.

analyzing means etlfective immediately upon completion or a data perforation in a'column'ot the record for analyzing said column for said per- Ioration, storing controlled by the analysing means" tore i team data for transmitting a series of signals representing said original data, receiving means for receiving check-back signals, and an indirect recording means for recording data represented by said check-back signals for visual comparison with the original recorded data; in combination with a second station including therein signal responsive means comprising a plurality of serially arranged relays adapted to be energized in succession by the transmitted data signals in accord-' ance with the magnitude of the data represented by said signals, perforating means associated with said relays and arranged for selective controlthereby, time delay means for delaying the operation of the perforating means until all of the signals representing a digit value of said data have been received by saidrelays so as to render only the last energized relay in the series effective to cause operation of the perforating means to make a duplicate data perforation in a predetermade in a column of the record for analyzing said column for said perforation, a relay storing unit controlled by the analyzing means for retaining the duplicate data from the analyzed columns of the record until a predetermined iater time when all the transmitted data has been duplicated in the form of perforations in the record, and readout means coacting with said storing means at said later time for sending check-back signals representing the duplicate data to the first station.

5. In combination, a primary station including therein means to transmit a series of impulses representing original data characters. original dat recording means for recording said characters,and means responsive to check-back impulses for recordingdata characters represented by said checkback impulses for visual comparison with the original recorded data; and a remote secondary station having receiving means responsive to said, impulses, record perforating means controlled by the receiving means to makecharacter-represenh ing perforations in successive columns 'of a multi-' column record so as to duplicate the data character analyzing means effective upon completion of each operation of the perforating means for ration just made therein'by said operation, storing means controlled by the analyzing means to cording the data character represented by said check-back signals fonvisual comparison with the original recorded character; and a remote secondary station having means for receiving said impulses during said time interval, perforating means selectively controlled by the receiving means to make a perforation representing said data character in a record, means to analyzesaid record for said perforation immediately upon operation of the perforating -means, storing means controlled by the analyzingmeans for retaining the character represented by the perforation until a predetermined later time after. said time interval readout means cooperating with the storing means at" said later time to send check-back signals corresponding to the character perforation in the record back to the primary station.

7'. In combination, a primary station including therein means to transmit a series of impulses 7 representing an original data character in a premined column of a multicolumn record. analyzing means effective as each data perforation is,

determined time interval, original data recording means for recording said character, and means responsive to check-back signals for recording the data character represented by said checkback signals for visual comparison with the originalrecorded character; and a remote secondary station having means for receiving said impulses during said time interval perforating means selectively controlled by the receiving means to record the character on a record, time delay means for rendering the receiving means ineffective to operate the recording means until after a time delay corresponding to thepredetermined time interval, analyzing means effective immediately upon recording of the character to analyze said record for said character, means to retain the analyzed character until a predetermined time subsequent to theaforesaid time interval,

and means controlled by the .character retaining means for sending check-back signals representingthe character as perforated in the record back to the primary station.

8. In a data recording system, a first station comprising a rotary distributor means totransmit multiple impulses representing original data jduring successive cycles, impulses representing analyzing the column of the record for the perforetain the character values from the analyzed .columns of the record until a predetermined later time when all of the character impulses have been received and the record perforated accordingly,

, representing an original data character in a predetermined tirne interval, original data'record-' ing means for recording said character, and

means responsive to check-back-signals for reone data character being .tuansmitted in each of said cycles, original data recording means for recording the original data, receiving means responsive to check-back signals, and recording means controlled by said receiving means for recording data represented by said signals for visual comparison with the original recorded data; in combination with a second station having therein a receiving means to receive the impulses representing one data. character during one of the aforesaid cycles of the'distributor means. a recording means controlled by the receiving means and including means for perforating a record card to represent the data character received, time delay means for rendering the receiving means ineffective to operate the recording means until all of said data impulses representing said character are-received, analyzing means operable immediately upon perforation of the card for analyzing said card for the data perforation therein, storing means controlled by the analyzing means to retain the analyzed data character until a predetermined subsequent time when all the data.- has been received and punched in the C8I(1,'8,I1d readout means coactin-g with said storing means at said subsequent time to cause check-back signals rep- 9. A transmission system for datacomprising,-

in combination, a first station havim means to transmit multiple impulses representing said data during successive time intervals, impulses representing .one digit value of said data being sent during each said interval, original datarecording means for recording the original data, and data. comparing means responsive to checkback signalstor comparing data represented by said signals with the original recorded data; and a. second station having an impulse receiving means comprising a series of digit value manifesting relays adapted to be energized in succession in accordance with the number .of'impulses received during one of said time intervals, perforating means for making a perforaefiective to operat the perforating means and thereby to record on the record the digit value manifested by said last energized relay, analyz-- ing means eifective immediately upon completion of an operation of the perforating means for reading the digit value .from the record while other character impulses are being received in the next time interval to effect a pertoration in the next column of the record, storing means for storing the analyzed digit values of data from the record until a later time when all the data has been received and punched in the record.

sent to the for reading out the stored digit values sending check-back signals nepresentative'of said digitvalues back to the first station to eifect operation of the data. verifying means at that station.

'10. IA data recording system, a first station comprising a rotary distributor means to trans-- 'mit multiple impulses representing digit values of original data, during succms'ive cycles, impulses representing one digit value of original data being transmitted during each said cycle, recording means to record said original data, and data comparing means responsive to check-back signals for comparing the datarepresented by said check-back with the original recorded data; in combination with a second station comprising a receiving means to receive the impulses representing a digit valueduring one'of the aforesaid cycles of the distributor means at the first station, a recording means controlled by the receiving means and including means to perforete a record cm to represent said digit value, sensing means operable immediately upon perforation of the card to sense said perforation while the rotary distributor means at the first station conitinues'lin operation to send out turther digit. value to perforat the card in a new location during the next cycle, storing means for storing the digit values as they are analyzed from the card, and readout means effective sit the end of a predetermined number of cycles for reading out the stored digit values and sending check-back signals representing the latter values back to the first station to operate the data verifying means at that station.

' JAMES W. BRYCE.

and readout means effective at time h 

